For monoviral infections and mixed infections (viral-viral and viral-bacterial), critical SpO2 and CRP levels were measured: mean SpO2 levels (87.4 ± 8.6%, 89.7 ± 8.6%, and 90 ± 5% for monoviral infections, viral-viral mixed infections, and viral-bacterial mixed infections, respectively); mean CRP levels (143.2 ± 103.4 mg/L, 150.8 ± 14.3 mg/L, and 206 ± 181.9 mg/L for monoviral infections, viral-viral mixed infections, and viral-bacterial mixed infections, respectively). The gene discussed is CRP; the disease is infection.